Toxicity of hexamethylenediamine

Area of Science:

• Toxicology
• Environmental Science
• Occupational Health

Background:

• Hexamethylenediamine (HMDA) is an industrial chemical with limited toxicological data available.
• Understanding HMDA's health and environmental effects is crucial for risk assessment and management.

Purpose of the Study:

• To comprehensively review the toxicological profile of Hexamethylenediamine (HMDA).
• To evaluate HMDA's acute and chronic toxicity, irritation potential, genotoxicity, reproductive/developmental effects, and environmental fate.

Main Methods:

• Literature review of existing toxicological studies on HMDA.
• Analysis of acute oral toxicity data (LD50 in rats).
• Assessment of skin and eye irritation, sensitization, and inhalation exposure effects.

Main Results:

• HMDA exhibits moderate acute oral toxicity (LD50 750-1500 mg/kg in rats).
• It is a severe skin and eye irritant but not a sensitizer in guinea pigs.
• Upper respiratory tract is the primary target in repeated inhalation studies; systemic damage is limited.
• No genotoxic, developmental, or reproductive toxicity observed, though one study noted a lower fetal NOAEL.
• HMDA is not persistent or bioaccumulative, with low toxicity to fish/invertebrates but high toxicity to algae.

Conclusions:

• HMDA presents moderate acute toxicity and significant irritative properties, particularly to the respiratory tract, skin, and eyes.
• Environmental risks are primarily associated with aquatic toxicity to algae.
• Further research, including carcinogenicity studies, is warranted given limited data.